US4739733A - Delivery timing regulator - Google Patents

Delivery timing regulator Download PDF

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Publication number
US4739733A
US4739733A US06/898,990 US89899086A US4739733A US 4739733 A US4739733 A US 4739733A US 89899086 A US89899086 A US 89899086A US 4739733 A US4739733 A US 4739733A
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US
United States
Prior art keywords
camshaft
timing
fuel delivery
cams
intake
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Expired - Fee Related
Application number
US06/898,990
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English (en)
Inventor
Ernst-Siegfried Hartmann
Werner Lemme
Eckhard Haas
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Kloeckner Humboldt Deutz AG
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Kloeckner Humboldt Deutz AG
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Assigned to KLOECKNER-HUMBOLDT-DEUTZ AG reassignment KLOECKNER-HUMBOLDT-DEUTZ AG ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HAAS, ECKHARD, HARTMANN, ERNST-SIEGFRIED, LEMME, WERNER
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/16—Adjustment of injection timing

Definitions

  • This invention relates to fuel injection and valve operating mechanisms for internal combustion engines and more particularly to use of a single camshaft to operate the fuel injectors and the intake and exhaust valves.
  • a sleeve with cams can be arranged on a camshaft of an internal combustion engine.
  • the sleeve is rotatable relative to the camshaft and is rotated relative thereto by a centrifugal governor responsive to the speed of the camshaft.
  • This prior design is costly to construct.
  • the injector pump elements must be together in one unit in order that all of the injector pump elements are controlled by a common centrifugal governor.
  • the injector pump elements cannot be spaced in accordance with the respective corresponding injector nozzles, so that the length of the injector lines cannot be kept at a minimum, which is contrary to the requirements of injector technology.
  • a main object of this invention is the provision of a mechanism operating intake and exhaust valves and injector pump elements with a single camshaft which is of a simple mechanical construction and at the same time makes it possible to arrange the injector pump elements along the axial length of the camshaft at the optimum desired position.
  • a single camshaft includes cams fixedly secured thereto for rotation therewith which operate the intake and exhaust valves and also a fuel injection pump for each cylinder of the engine and a single delivery timing device operable to change the rotated position of the camshaft relative to the drive shaft in response to engine speed.
  • the cams for actuating the injector pump elements are nonrotatably fixed on the camshaft and inasmuch as the delivery timing regulator rotates the entire camshaft relative to the drive shaft, a simpler mechanical construction of the entire drive train is achieved.
  • the cams for actuating the injector pump elements are machined and finished on the cast or forged camshaft in one manufacturing operation along with the intake and exhaust valve cams.
  • the cams for actuating the injector pump elements can be positioned at convenient points along the axial length of the camshaft and, thus, the requirements for the camshaft can be met with regard to mechanical and dynamic characteristics and the positioning of the injector pump elements relative to the corresponding injection valves can be carried out in a simple manner.
  • the fuel delivery timing regulator is advantageously integrated into the drive gear of the camshaft. Because of this, no special requirements are imposed on the delivery timing regulator and, therefore, a standard commercial delivery timing regulator may be employed.
  • the delivery timing regulator can function on a mechanical, hydraulic or electrical basis.
  • the cams for actuating the intake and exhaust valves and the injection pump elements are arranged with respect to each other and coordinated with the regulating characteristics of the delivery timing regulator such that at approximately average rpms between idle and the rated rpms of the internal combustion engine, the optimum regulated fuel delivery timing for the entire rpm range coincides with the optimal value for the intake and exhaust valve timing.
  • the fuel delivery timing which is the determining factor for efficient combustion, is regulated at predetermined optimum values of performance over the entire rpm range of the internal combustion engine.
  • the optimum adjustment of the valve timing occurs at the average rpm of the engine which is the speed at which the engine produces its maximum torque.
  • the control timing errors that result at both limiting rpm values are approximately half of the value of the total delivery timing adjustment.
  • Such timing deviations do not adversely affect the operation of the internal combustion engine.
  • timing deviations to obtain approximately the optimum value over the entire rpm range, and within a specific tolerance range have already been included in the basic design of the internal combustion engine. Consequently, with a design according to the invention, the advantage that results is that at a maximum torque speed, the valve timing does not deviate from the predetermined optimum setting.
  • FIG. 1 is a partial section of an engine showing fuel delivery elements and intake and exhaust valve push rods associated with a single camshaft;
  • FIG. 2 is a graph showing the correlation of the fuel delivery and valve timing.
  • a third cam 7 or 7a is provided on the camshaft 1.
  • the outer circumference of each cam 7, 7a contacts a push rod 8 which in turn contacts a reciprocable injection pump element of a fuel injection pump 9.
  • Each of the injection pumps 9 is provided with fuel in a nonillustrated manner, said fuel being delivered by the pumping action of the pump 9 through the partially illustrated injection lines 10 which extend to the corresponding injector nozzles, not shown, at the respective cylinders.
  • FIG. 2 the angular adjustment of the camshaft versus the speed of the internal combustion engine is illustrated graphically.
  • the left side of the graph represents the angular adjustment of the injector cams 7, 7a in degrees.
  • the appropriate correlation of the timing for the intake and exhaust valves of the internal combustion engine is recorded. From the diagram it can be seen that the optimal valve and fuel timing lies approximately at the midpoint of the engine speed between the idle rpm value n u and the rated rpm value n r and corresponds to the rpm value at which maximum torque n m exists.
  • the fuel delivery timing, and consequently the injection is optimum at all rpm values, while the timing of the intake and exhaust valves is optimum at average rpms.
  • the valve timing occurs 2 degrees of camshaft angle too late and at rated speed n r , the valve timing occurs 2 degrees of camshaft angle too early, which has no negative influence on the operational characteristics of the internal combustion engine.
US06/898,990 1985-08-23 1986-08-19 Delivery timing regulator Expired - Fee Related US4739733A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3530134 1985-08-23
DE19853530134 DE3530134A1 (de) 1985-08-23 1985-08-23 Foerderbeginnversteller

Publications (1)

Publication Number Publication Date
US4739733A true US4739733A (en) 1988-04-26

Family

ID=6279174

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/898,990 Expired - Fee Related US4739733A (en) 1985-08-23 1986-08-19 Delivery timing regulator

Country Status (3)

Country Link
US (1) US4739733A (un)
EP (1) EP0214518A1 (un)
DE (1) DE3530134A1 (un)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5083544A (en) * 1989-09-07 1992-01-28 Mario Brighigna compression-ignition engine, in particular for light aircraft
US5287840A (en) * 1992-07-30 1994-02-22 General Electric Canada Inc. Cam sections for a "V"-type diesel engine
US5507261A (en) * 1995-05-12 1996-04-16 Caterpillar Inc. Four cycle engine with two cycle compression braking system
US5603303A (en) * 1994-04-28 1997-02-18 Nippondenso Co., Ltd. High pressure fuel supply pump
US6349688B1 (en) 2000-02-18 2002-02-26 Briggs & Stratton Corporation Direct lever overhead valve system
US7753032B2 (en) * 2007-09-20 2010-07-13 Hitachi, Ltd. Control apparatus for cylinder injection internal combustion engine with high-pressure fuel pump

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3935883C2 (de) * 1989-10-27 1996-08-01 Kloeckner Humboldt Deutz Ag Viertakt-Dieselbrennkraftmaschine

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2057354A (en) * 1935-11-04 1936-10-13 Withers William Harold Internal combustion engine automatic valve control
US3142996A (en) * 1964-08-04 anderson
US4332222A (en) * 1978-05-20 1982-06-01 Volkswagenwerk Aktiengesellschaft Camshaft for an internal combustion engine
US4335686A (en) * 1978-12-19 1982-06-22 Steyr-Daimler-Puch Aktiengesellschaft Valve control and pump-actuating means of internal combustion engine with fuel injection
DE3224951A1 (de) * 1982-07-03 1984-01-05 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Einrichtung zur aenderung der ventil- und/oder einspritz steuerzeiten an einer hubkolbenbrennkraftmaschine
US4463712A (en) * 1981-11-25 1984-08-07 Ford Motor Company Device for varying the valve timing of internal combustion engines in correlation to load and speed
US4522085A (en) * 1982-08-30 1985-06-11 Kane Garold L Variable lobe cam mechanism
US4561390A (en) * 1982-11-12 1985-12-31 Toyota Jidosha Kabushiki Kaisha Variable valve-timing apparatus in an internal combustion engine
US4590905A (en) * 1984-05-04 1986-05-27 Honda Giken Kogyo Kabushiki Kaisha Process for decompression control in internal combustion engine and apparatus therefor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB123718A (en) * 1918-02-27 1919-09-18 Rodolphe Edgard Mathot Improvements in Mechanism for Regulating the Timing of the Fuel Supply in Liquid Fuel Engines.
GB772392A (en) * 1954-07-24 1957-04-10 Burmeister & Wains Mot Mask Improvements in and relating to a method of operating turbo-charged two-stroke cycleinternal combustion engines, and arrangement in such engines for carrying out the method
FR1188400A (fr) * 1957-08-15 1959-09-22 Lanova Ag Dispositif de réglage d'injection pour moteur à combustion interne
AT247667B (de) * 1961-05-02 1966-06-27 Cunewalde Motoren Ventilgesteuerte Viertakteinspritzbrennkraftmaschine
DE1219730B (de) * 1963-11-26 1966-06-23 Friedmann & Maier Ag Einspritzpumpe fuer Brennkraftmaschinen mit Einspritzzeitpunkt-Verstelleinrichtung
US3913548A (en) * 1974-06-11 1975-10-21 Ora E Wilson Fuel injection engine
AT353557B (de) * 1978-04-21 1979-11-26 Steyr Daimler Puch Ag Regelvorrichtung fuer luftverdichtende, selbst- zuendende brennkraftmaschinen
DE3128332A1 (de) * 1981-07-14 1983-01-27 Gebrüder Sulzer AG, 8401 Winterthur "mit nocken bestueckte steuerwelle"
DE3441508A1 (de) * 1984-11-14 1986-05-22 Klöckner-Humboldt-Deutz AG, 5000 Köln Einrichtung zum verstellen des einspritzzeitpunktes oder der ventilsteuerzeiten einer brennkraftmaschine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3142996A (en) * 1964-08-04 anderson
US2057354A (en) * 1935-11-04 1936-10-13 Withers William Harold Internal combustion engine automatic valve control
US4332222A (en) * 1978-05-20 1982-06-01 Volkswagenwerk Aktiengesellschaft Camshaft for an internal combustion engine
US4335686A (en) * 1978-12-19 1982-06-22 Steyr-Daimler-Puch Aktiengesellschaft Valve control and pump-actuating means of internal combustion engine with fuel injection
US4463712A (en) * 1981-11-25 1984-08-07 Ford Motor Company Device for varying the valve timing of internal combustion engines in correlation to load and speed
DE3224951A1 (de) * 1982-07-03 1984-01-05 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Einrichtung zur aenderung der ventil- und/oder einspritz steuerzeiten an einer hubkolbenbrennkraftmaschine
US4522085A (en) * 1982-08-30 1985-06-11 Kane Garold L Variable lobe cam mechanism
US4561390A (en) * 1982-11-12 1985-12-31 Toyota Jidosha Kabushiki Kaisha Variable valve-timing apparatus in an internal combustion engine
US4590905A (en) * 1984-05-04 1986-05-27 Honda Giken Kogyo Kabushiki Kaisha Process for decompression control in internal combustion engine and apparatus therefor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5083544A (en) * 1989-09-07 1992-01-28 Mario Brighigna compression-ignition engine, in particular for light aircraft
US5287840A (en) * 1992-07-30 1994-02-22 General Electric Canada Inc. Cam sections for a "V"-type diesel engine
US5603303A (en) * 1994-04-28 1997-02-18 Nippondenso Co., Ltd. High pressure fuel supply pump
US5507261A (en) * 1995-05-12 1996-04-16 Caterpillar Inc. Four cycle engine with two cycle compression braking system
US6349688B1 (en) 2000-02-18 2002-02-26 Briggs & Stratton Corporation Direct lever overhead valve system
US7753032B2 (en) * 2007-09-20 2010-07-13 Hitachi, Ltd. Control apparatus for cylinder injection internal combustion engine with high-pressure fuel pump

Also Published As

Publication number Publication date
EP0214518A1 (de) 1987-03-18
DE3530134A1 (de) 1987-02-26

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Owner name: KLOECKNER-HUMBOLDT-DEUTZ AG, POSTFACH 80 05 09 500

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